GMAT Math : Calculating percents

Study concepts, example questions & explanations for GMAT Math

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Example Questions

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Example Question #61 : Percents

What is ?

Possible Answers:

Correct answer:

Explanation:

  is equal to

Example Question #61 : Calculating Percents

 is  of what number?

Possible Answers:

Correct answer:

Explanation:

Let  be the number in question.  of this number is equal to , so

Example Question #141 : Arithmetic

Jill buys a new tablet for . If she used a coupon and received  off of the original price, what was the percent discount she received?

Possible Answers:

Correct answer:

Explanation:

Jill buys a new tablet for . If she used a coupon and received  off of the original price, what was the percent discount she received?

So, to find percent discount, we need to calculate the original price. 

Then, we need to find the percent of the discount. To do so, simply divide the amount of the discount by the original amount, then multiply by 100

Example Question #142 : Arithmetic

 of a certain number is . What is the number? 

Possible Answers:

Correct answer:

Explanation:

Here, we need to first convert the percent into a fraction. Then, we will solve the equation.  Our number is unknown, so I will call it 

  

Example Question #143 : Arithmetic

Given a number , which of these is the greatest quantity of the three?

(a) 30% of 40% of 50% of 

(b) 40% of 50% of 30% of 

(c) 50% of 30% of 40% of 

Possible Answers:

40% of 50% of 30% of 

30% of 40% of 50% of 

50% of 30% of 40% of 

All three are equal to one another

It is impossible to tell without knowing the value of 

Correct answer:

All three are equal to one another

Explanation:

All three are equal.

 

30% of 40% of 50% of is  of  of  of : that is, 

 

40% of 50% of 30% of is  of  of  of : that is, 

 

 50% of 30% of 40% of is  of  of  of : that is

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